Scientists use three types of investigations to research and develop explanations for events in the nature: descriptive investigation, comparative investigation, and experimental investigation.

Which part of an investigation is only found in an experimental investigation the answer is a control group.

Be sure to have:

• Make an observation about a phenomenon (qualitative and/or quantitative)
• Ask a research question.
• Hypothesize a possible answer for your question.
• Create a procedure to test your hypothesis.
• Identify what you are testing.
• Identify your control group/experimental group.

Astronomers, meteorologists, and geologists often conduct descriptive investigations. Classification of leaves is an example of a descriptive investigation. Observing animal behavior in nature is another example. Descriptive investigations use careful observations and measurements to develop findings.

Quantitative, as opposed to qualitative investigations provide large amounts of information about a wide range of variables. Quantitative investigations yield numerous results – they are all about the quantity, or large number of results, whereas qualitative are more about the quality.

Limitation of comparative investigation is that when it is done on a huge population, huge amount cost is required. Explanation: Benefit of comparative investigation is that we can get descrete information about specific breed or species. It is important for the study of behaviour of many organisms.

Which is a limitation of comparative investigations? They give results that are usually not repeatable by other scientists. They might show variable relationships that are not actually cause and effect. They can usually only be conducted in labs instead of in natural environments.

Descriptive investigations are not repeatable because they are based only on observations made at a single point in time. The results may vary at a different time. In addition, descriptive investigations do not contain variables that may indicate cause-and-effect relationships.

1 Answer. The zeros of a function represent the x value(s) that result in the y value being 0. The zeros of a function represent the root(s) of a function. The zeros of a function represent the solution(s) of a function.

Step-by-step explanation: They are all the same thing because they all occur when the quadratic equation is equal to zero. When real, the solutions occur as x-intercepts and when imaginary they occur as complex conjugates that are solutions of the quadratic equation when it is set equal to zero.

Roots are also called x-intercepts or zeros. The roots of a function are the x-intercepts. By definition, the y-coordinate of points lying on the x-axis is zero. Therefore, to find the roots of a quadratic function, we set f (x) = 0, and solve the equation, ax2 + bx + c = 0.

Answer: The roots are ± 12. Roots represents the square root and finding a solution to an equation.

The roots are the x-intercepts, where the parabola crosses the x-axis. If the parabola opens up and it’s vertex is below the x-axis then it crosses the x-axis in two places and has two (real) roots. If the vertex is on the x-axis then the parabola has one root.

Here are the three forms a quadratic equation should be written in:

• 1) Standard form: y = ax2 + bx + c where the a,b, and c are just numbers.
• 2) Factored form: y = (ax + c)(bx + d) again the a,b,c, and d are just numbers.
• 3) Vertex form: y = a(x + b)2 + c again the a, b, and c are just numbers.

To work out the number of roots a qudratic ax2​+bx+c=0 you need to compute the discriminant (b2​-4ac). If the discrimant is less than 0, then the quadratic has no real roots. If the discriminant is equal to zero then the quadratic has equal roosts.

64 is a perfect square number which can be obtained by the square of 8. Hence, the square root of 64 is a rational number….Square Root of 64.

two

The discriminant can be positive, zero, or negative, and this determines how many solutions there are to the given quadratic equation. A positive discriminant indicates that the quadratic has two distinct real number solutions. A negative discriminant indicates that neither of the solutions are real numbers.

When the Discriminant is Zero If the discriminant is 0, that means you have a 0 under the square root in the quadratic formula. When this happens, the plus or minus part of the quadratic formula essentially just goes away. This will leave you with only 1 real solution.